diff --git a/quad/.travis.yml b/quad/.travis.yml
index 8b10ff4a..99d4a269 100644
--- a/quad/.travis.yml
+++ b/quad/.travis.yml
@@ -23,7 +23,6 @@ env:
 matrix:
   allow_failures:
     #- env: RACKET_VERSION=HEAD
-    - env: RACKET_VERSION=HEADCS
   # Fast finish: Overall build result is determined as soon as any of
   # its rows have failed, or, all of its rows that aren't allowed to
   # fail have succeeded.